package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService threadPool= Executors.newFixedThreadPool(3);
        for(int i=0;i<5;i++){
            Runnable runnable=()-> {

                    try {
                        Thread t=Thread.currentThread();
                        System.out.println(t.getName()+"正在执行一个任务");
                        Thread.sleep(5000);
                        System.out.println(t.getName()+"执行完毕");
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
            };
           threadPool.execute(runnable);
            System.out.println("将一个线程交给了线程池");
        }
        threadPool.shutdownNow();
        System.out.println("线程池关闭了");
    }
}
